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<title>module OpenSSL::Timestamp - openssl: Ruby Standard Library Documentation</title>


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  <h3>Table of Contents</h3>

  <ul class="link-list" role="directory">
    <li><a href="#module-OpenSSL::Timestamp-label-Create+a+Response-3A">Create a Response:</a>
    <li><a href="#module-OpenSSL::Timestamp-label-Verify+a+timestamp+response-3A">Verify a timestamp response:</a>
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    <h1 id="module-OpenSSL::Timestamp" class="module">
      module OpenSSL::Timestamp
    </h1>

    <section class="description">
    
<p>Provides classes and methods to request, create and validate <a href="http://www.ietf.org/rfc/rfc3161.txt">RFC3161-compliant</a> timestamps. <a href="Timestamp/Request.html"><code>Request</code></a> may be used to either create requests from scratch or to parse existing requests that again can be used to request timestamps from a timestamp server, e.g. via the net/http. The resulting timestamp response may be parsed using <a href="Timestamp/Response.html"><code>Response</code></a>.</p>

<p>Please note that <a href="Timestamp/Response.html"><code>Response</code></a> is read-only and immutable. To create a <a href="Timestamp/Response.html"><code>Response</code></a>, an instance of <a href="Timestamp/Factory.html"><code>Factory</code></a> as well as a valid <a href="Timestamp/Request.html"><code>Request</code></a> are needed.</p>

<h3 id="module-OpenSSL::Timestamp-label-Create+a+Response-3A">Create a Response:<span><a href="#module-OpenSSL::Timestamp-label-Create+a+Response-3A">&para;</a> <a href="#top">&uarr;</a></span></h3>

<pre class="ruby"><span class="ruby-comment">#Assumes ts.p12 is a PKCS#12-compatible file with a private key</span>
<span class="ruby-comment">#and a certificate that has an extended key usage of &#39;timeStamping&#39;</span>
<span class="ruby-identifier">p12</span> = <span class="ruby-constant">OpenSSL</span><span class="ruby-operator">::</span><span class="ruby-constant">PKCS12</span>.<span class="ruby-identifier">new</span>(<span class="ruby-constant">File</span>.<span class="ruby-identifier">binread</span>(<span class="ruby-string">&#39;ts.p12&#39;</span>), <span class="ruby-string">&#39;pwd&#39;</span>)
<span class="ruby-identifier">md</span> = <span class="ruby-constant">OpenSSL</span><span class="ruby-operator">::</span><span class="ruby-constant">Digest</span>.<span class="ruby-identifier">new</span>(<span class="ruby-string">&#39;SHA1&#39;</span>)
<span class="ruby-identifier">hash</span> = <span class="ruby-identifier">md</span>.<span class="ruby-identifier">digest</span>(<span class="ruby-identifier">data</span>) <span class="ruby-comment">#some binary data to be timestamped</span>
<span class="ruby-identifier">req</span> = <span class="ruby-constant">OpenSSL</span><span class="ruby-operator">::</span><span class="ruby-constant">Timestamp</span><span class="ruby-operator">::</span><span class="ruby-constant">Request</span>.<span class="ruby-identifier">new</span>
<span class="ruby-identifier">req</span>.<span class="ruby-identifier">algorithm</span> = <span class="ruby-string">&#39;SHA1&#39;</span>
<span class="ruby-identifier">req</span>.<span class="ruby-identifier">message_imprint</span> = <span class="ruby-identifier">hash</span>
<span class="ruby-identifier">req</span>.<span class="ruby-identifier">policy_id</span> = <span class="ruby-string">&quot;1.2.3.4.5&quot;</span>
<span class="ruby-identifier">req</span>.<span class="ruby-identifier">nonce</span> = <span class="ruby-value">42</span>
<span class="ruby-identifier">fac</span> = <span class="ruby-constant">OpenSSL</span><span class="ruby-operator">::</span><span class="ruby-constant">Timestamp</span><span class="ruby-operator">::</span><span class="ruby-constant">Factory</span>.<span class="ruby-identifier">new</span>
<span class="ruby-identifier">fac</span>.<span class="ruby-identifier">gen_time</span> = <span class="ruby-constant">Time</span>.<span class="ruby-identifier">now</span>
<span class="ruby-identifier">fac</span>.<span class="ruby-identifier">serial_number</span> = <span class="ruby-value">1</span>
<span class="ruby-identifier">timestamp</span> = <span class="ruby-identifier">fac</span>.<span class="ruby-identifier">create_timestamp</span>(<span class="ruby-identifier">p12</span>.<span class="ruby-identifier">key</span>, <span class="ruby-identifier">p12</span>.<span class="ruby-identifier">certificate</span>, <span class="ruby-identifier">req</span>)
</pre>

<h3 id="module-OpenSSL::Timestamp-label-Verify+a+timestamp+response-3A">Verify a timestamp response:<span><a href="#module-OpenSSL::Timestamp-label-Verify+a+timestamp+response-3A">&para;</a> <a href="#top">&uarr;</a></span></h3>

<pre>#Assume we have a timestamp token in a file called ts.der
ts = OpenSSL::Timestamp::Response.new(File.binread(&#39;ts.der&#39;))
#Assume we have the Request for this token in a file called req.der
req = OpenSSL::Timestamp::Request.new(File.binread(&#39;req.der&#39;))
# Assume the associated root CA certificate is contained in a
# DER-encoded file named root.cer
root = OpenSSL::X509::Certificate.new(File.binread(&#39;root.cer&#39;))
# get the necessary intermediate certificates, available in
# DER-encoded form in inter1.cer and inter2.cer
inter1 = OpenSSL::X509::Certificate.new(File.binread(&#39;inter1.cer&#39;))
inter2 = OpenSSL::X509::Certificate.new(File.binread(&#39;inter2.cer&#39;))
ts.verify(req, root, inter1, inter2) -&gt; ts or raises an exception if validation fails</pre>

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